US3989824A - Method for controlling acarids with phosphine oxides - Google Patents

Method for controlling acarids with phosphine oxides Download PDF

Info

Publication number
US3989824A
US3989824A US05/555,884 US55588475A US3989824A US 3989824 A US3989824 A US 3989824A US 55588475 A US55588475 A US 55588475A US 3989824 A US3989824 A US 3989824A
Authority
US
United States
Prior art keywords
acarids
bis
carbon atoms
chlorophenyl
plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/555,884
Other languages
English (en)
Inventor
Edwin L. Sukman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arkema Inc
Original Assignee
M&T Chemicals Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by M&T Chemicals Inc filed Critical M&T Chemicals Inc
Priority to US05/555,884 priority Critical patent/US3989824A/en
Priority to GB8763/76A priority patent/GB1545794A/en
Priority to DE2609254A priority patent/DE2609254C2/de
Priority to CH278376A priority patent/CH616828A5/de
Priority to FR7606440A priority patent/FR2302686A1/fr
Priority to SE7603037A priority patent/SE420258B/xx
Priority to NO760773A priority patent/NO148473C/no
Priority to IT09367/76A priority patent/IT1060941B/it
Priority to DK95776AA priority patent/DK142102B/da
Priority to NLAANVRAGE7602293,A priority patent/NL182275C/nl
Priority to BE164936A priority patent/BE839299A/nl
Priority to AT167776A priority patent/AT346123B/de
Priority to CA247,299A priority patent/CA1043699A/en
Priority to US05/729,029 priority patent/US4101655A/en
Application granted granted Critical
Publication of US3989824A publication Critical patent/US3989824A/en
Assigned to ATOCHEM NORTH AMERICA, INC. reassignment ATOCHEM NORTH AMERICA, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: ATOCHEM INC., A CORP. OF DE., M&T CHEMICALS INC., A CORP. OF DE., (MERGED INTO), PENNWALT CORPORATION, A CORP. OF PA., (CHANGED TO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/28—Phosphorus compounds with one or more P—C bonds
    • C07F9/50—Organo-phosphines
    • C07F9/53—Organo-phosphine oxides; Organo-phosphine thioxides
    • C07F9/5325—Aromatic phosphine oxides or thioxides (P-C aromatic linkage)
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
    • A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
    • A01N57/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing aromatic radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/28—Phosphorus compounds with one or more P—C bonds
    • C07F9/50—Organo-phosphines
    • C07F9/5022—Aromatic phosphines (P-C aromatic linkage)

Definitions

  • This invention relates to the control of acarids.
  • This invention further relates to compositions for controlling acarids, including mites, that can be applied directly to these organisms, their eggs or to areas, particularly plants, that are infested with these organisms.
  • This invention provides a method for controlling acarids by applying to said acarids their eggs or to substrates susceptible to infestation with said acarids an acaricidally effective amount of a phosphorus compound exhibiting the formula ##SPC1##
  • R is selected from the group consistng of alkyl radicals containing between 1 and 12 carbon atoms, alkenyl and alkynyl radicals containing between 2 and 12 carbon atoms, cycloalkyl, aryl, alkaryl, aralkyl and haloalkyl radicals, X represents a halogen atom selected from the group consisting of fluorine, chlorine, bromine and iodine atoms and Z represents oxygen or sulfur.
  • the present acaricides are tertiary bis(p-halophenyl) phosphines, phosphine oxides and phosphine sulfides.
  • R of the preceding formulae represents an alkyl radical, it may contain one or more halogen atoms as substituents.
  • These compounds effectively control acarids, including spider mites, at considerably lower concentrations than can be achieved using structurally related compounds, such as the aforementioned bis(halophenyl)phosphinates that are disclosed in the chemical and patent literature.
  • the comparative efficacy of the present acaricides and the criticality of the substituents on both the phenyl radicals and the phosphorus atom are demonstrated in the accompanying examples. In addition to killing nymph and adult acarids, the present compounds also inhibit development of the eggs of these organisms.
  • While many known acaricides are effective when sprayed onto plant leaves infested with mites, the present compounds are unique in that they can also be applied to the soil surrounding the roots of the plant and are transported by the plant to the leaves, where both mites and their eggs are killed.
  • phosphines are conveniently prepared by reacting the appropriate halophenyl magnesium halide and dichloroorganophosphine.
  • the dichloroorganophosphines are either available from commercial suppliers or can be synthesized using known preparative methods, for example those disclosed in "Organ-phosphorus Compounds" by G. M. Kosolapoff, published by John Wiley and Sons, Inc.
  • the resultant bishalophenyl)organophosphine is readily converted to the corresponding phosphine oxide or phosphine sulfide by reacting the phosphine with hydrogen peroxide or elemental sulfur, respectively.
  • the phosphine oxides can be prepared directly from a halophenylmagnesium halide by reacting it with the appropriate organophosphonic dichloride, ##STR1##
  • the solid residue was recrystallized once from benzene to yield 90 g. of a white solid that melted between 167° and 169° C.
  • Analysis of the recrystallized product revealed a phosphorus content of 10.9% and a chlorine content of 22.3%.
  • the calculated phosphorus and chlorine content of bis(p-chlorophenyl)methylphosphine oxide is 10.9 and 24.9%, respectively.
  • the structure of the compound was confirmed by nuclear magnetic resonance.
  • the organic layer was then separated, dried using anhydrous magnesium sulfate and the methylene chloride removed under reduced pressure.
  • the residue was passed through a column of neutral alumina using ethyl acetate as the eluent.
  • the white solid obtained following removal of the eluent and one recrystallization of the residue from benzene weighed 90 g., melted between 114° and 117° C. and exhibited the following analysis: chlorine -- 32.8%; phosphorus -- 9.89%.
  • the calculated values for bis(p-chlorophenyl)chloromethylphosphine oxide are 33.3 and 9.70%, respectively.
  • the nuclear magnetic resonance spectrum was consistent with the desired structure.
  • Bis(p-chlorophenyl)propylphosphine was prepared by reacting 0.2 mole of propyldichlorophosphine with a 0.4 mole of p-chlorophenylmagnesium bromide. The product was isolated by chloroform extraction and distillation as previously described. The portion boiling between 160° and 165° C. under a pressure of 2 mm. Hg was collected. The analysis corresponded to bis(p-chlorophenyl)propylphosphine.
  • the present phosphines, phosphine oxides and phosphine sulfides can be applied directly on the acarids, to plants infested with acarids or to plants and other substrates which are susceptible to attack by acarids.
  • the long term residual activity and low phytotoxicity that characterize the present acaricides makes it possible to apply these compounds to plants several days, and in some instances weeks, prior to the time when the plant will be exposed to the acarids.
  • the present compounds are conventionally applied to plants as liquid sprays, solid dusts or wettable powder.
  • compositions suitable for spraying are usually prepared by diluting liquid concentrates or wettable powders containing between 10 and 90% of the active toxicant. To avoid the expense of transporting formulations containing large amounts of inert diluents, the dilution is usually performed at the location where the spray will be applied.
  • concentration of toxicant in a spray to be applied to plants in a field is between 10 and 1000 parts per million (ppm), preferably between 100 and 500 parts per million.
  • Solid dust compositions which are generally applied over a relatively small area, contain between 1 and 50% by weight of active toxicant, preferably between 1 and 10%.
  • the concentration of toxicant required in a given formulation will be dependent upon a number of parameters including the method of application, i.e. whether at ground level or from aircraft, the activity of the particular toxicant against the acarid and weather conditions in the area being treated.
  • the present acaricides can be blended with many commonly employed finely divided solids, such a as s earth, attapulgite, bentonite, pyrophyllite, vemriculite, diatomaceous earth, talc, chalk, gypsum, wood flour, and the like.
  • the finely divided carrier is ground or mixed with the acaricidal toxicant or wetted with a dispersion of the toxicant in a volatile liquid.
  • these compositions can be employed as concentrates and subsequently diluted with additional solid carriers to obtain the desired amount of active toxicant.
  • concentrate dust compositions can be incorporated in intimate admixture with surface active dispersing agents such as ionic or nonionic emulsifying or dispersing agents to form spray concentrates.
  • surface active dispersing agents such as ionic or nonionic emulsifying or dispersing agents to form spray concentrates.
  • Such concentrates are readily dispersible in liquid carriers to form spray compositions or liquid formulations containing the toxicants in any desired amount.
  • the choice of surface active agent and amount employed are determined by the ability of the agent to facilitate the dispersing of the concentrate in the liquid carrier to produce the desired liquid composition.
  • Suitable liquid carriers include water, methanol, ethanol, isopropanol, methyl ethyl ketone, acetone, methylene chloride, chlorobenzene, toluene, xylene, and petroleum distillates.
  • preferred petroleum distillates are those boiling almost entirely under 205° C. at atmospheric pressure and having a flash point above about 30° C.
  • the acaricide may be compounded with a suitable water-immiscible organic liquid and a surface active dispersing agent to produce emulsifiable concentrates which may be further diluted with water and oil to form spray mixtures in the form of oil-in-water emulsions.
  • the carrier comprises an aqueous emulsion, i.e. a mixture of water-immiscible solvent, emulsifying agent and water.
  • Preferred dispersing agents which may be employed in these compositions are oil soluble and include the condensation products of alkylene oxides with phenols and organic or inorganic acids, polyoxyethylene derivatives of sorbitan esters, alkylarylsulfonates, complex ether alcohols, mahogany soaps and the like.
  • Suitable organic liquids to be employed in the compositions include petroleum distillates, hexanol, liquid halohydrocarbons and synthetic organic oils.
  • the surface active dispersing agents are usually employed in the liquid dispersions and aqueous emulsions in the amount of from about 1 to about 20 percent by weight of the combined weight of the dispersing agent and the active toxicant.
  • Formulations were prepared by dissolving the compound to be tested in a mixture of acetone and a liquid alkyl-aryl polyether alcohol type surfactant (Triton X-155) and diluting the resultant composition to the desired concentration using a water-acetone mixture such that the final formulation contained 10% acetone and 10 parts per million (ppm) of the surfactant.
  • Triton X-155 a liquid alkyl-aryl polyether alcohol type surfactant
  • the activity of a given compound as a contact acaricide against the two-spotted spider mite was determined by transferring adult and nymph mites to the leaves of Sieva lima bean plants. Twenty four hours following the transfer the leaves were either sprayed with or dipped into the aforementioned formulation containing 200 ppm of the compound to be tested. If the compound was to be evaluated as a systemic acaricide and ovicide 21 cc. of a formulation containing 520 ppm of the active compound was poured into the soil surrounding the infested plant.
  • the following compounds were found to be effective contact type acaricides at a concentration of 200 ppm, in that they killed at least 70% of the adult mites, nymphs and/or eggs.
  • a formulation containing 100 ppm of bis(p-chlorophenyl)chloromethylphosphine oxide was poured onto the soil surrounding the roots of a Sieva lima bean plant which was infested with spider mites and eggs. Six days later 97% of the adult mites and 90% of the eggs were dead on one leaf. Examination of a second leaf revealed that 100% of the eggs had been killed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Molecular Biology (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
US05/555,884 1975-03-06 1975-03-06 Method for controlling acarids with phosphine oxides Expired - Lifetime US3989824A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US05/555,884 US3989824A (en) 1975-03-06 1975-03-06 Method for controlling acarids with phosphine oxides
GB8763/76A GB1545794A (en) 1975-03-06 1976-03-04 Use of halophenyl phosphines-phosphine oxides and -phosphine sulphides for controlling acarids or their eggs
NLAANVRAGE7602293,A NL182275C (nl) 1975-03-06 1976-03-05 Werkwijze ter bereiding van een preparaat voor het bestrijden van insecten en spinachtigen en de eitjes daarvan, onder toepassing van bis-(halogeenfenyl)-gesubstitueerde organische fosforverbindingen alsmede werkwijze ter bereiding van dergelijke fosforverbindingen.
FR7606440A FR2302686A1 (fr) 1975-03-06 1976-03-05 Composition acaricide a base d'une phosphine et son application
SE7603037A SE420258B (sv) 1975-03-06 1976-03-05 Komposition for avdodande av akarider och egg av skarider innehallande som aktiv substans vissa fosforforeningar
NO760773A NO148473C (no) 1975-03-06 1976-03-05 Middel til aa drepe midder og deres egg og anvendelse av middelet
IT09367/76A IT1060941B (it) 1975-03-06 1976-03-05 Composizioni insetticide e metodo per il loro impiegeo
DK95776AA DK142102B (da) 1975-03-06 1976-03-05 Fremgangsmåde til bekæmpelse af acarider og middel til udøvelse af fremgangsmåden.
DE2609254A DE2609254C2 (de) 1975-03-06 1976-03-05 Mittel zur Vernichtung von Akariden und ihren Eiern
CH278376A CH616828A5 (nl) 1975-03-06 1976-03-05
BE164936A BE839299A (nl) 1975-03-06 1976-03-08 Werkwijze voor het bereiden van bis(halogeenfenyl) fosforverbindingen bevattende preparaten voor het bestrijden van insecten
AT167776A AT346123B (de) 1975-03-06 1976-03-08 Akarizide zusammensetzungen
CA247,299A CA1043699A (en) 1975-03-06 1976-03-08 Insecticidal compositions and method for using same
US05/729,029 US4101655A (en) 1975-03-06 1976-10-04 Insecticidal and ovicidal method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/555,884 US3989824A (en) 1975-03-06 1975-03-06 Method for controlling acarids with phosphine oxides

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/729,029 Continuation-In-Part US4101655A (en) 1975-03-06 1976-10-04 Insecticidal and ovicidal method

Publications (1)

Publication Number Publication Date
US3989824A true US3989824A (en) 1976-11-02

Family

ID=24218973

Family Applications (2)

Application Number Title Priority Date Filing Date
US05/555,884 Expired - Lifetime US3989824A (en) 1975-03-06 1975-03-06 Method for controlling acarids with phosphine oxides
US05/729,029 Expired - Lifetime US4101655A (en) 1975-03-06 1976-10-04 Insecticidal and ovicidal method

Family Applications After (1)

Application Number Title Priority Date Filing Date
US05/729,029 Expired - Lifetime US4101655A (en) 1975-03-06 1976-10-04 Insecticidal and ovicidal method

Country Status (13)

Country Link
US (2) US3989824A (nl)
AT (1) AT346123B (nl)
BE (1) BE839299A (nl)
CA (1) CA1043699A (nl)
CH (1) CH616828A5 (nl)
DE (1) DE2609254C2 (nl)
DK (1) DK142102B (nl)
FR (1) FR2302686A1 (nl)
GB (1) GB1545794A (nl)
IT (1) IT1060941B (nl)
NL (1) NL182275C (nl)
NO (1) NO148473C (nl)
SE (1) SE420258B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101655A (en) * 1975-03-06 1978-07-18 M & T Chemicals Inc. Insecticidal and ovicidal method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561198A (en) * 1976-10-04 1980-02-13 M & T Chemicals Inc Methods for the control insects
US5023247A (en) * 1983-09-29 1991-06-11 Insecta Paint, Inc. Insecticidal coating composition and processes for making and using it
DE3426722A1 (de) * 1984-07-20 1986-01-23 Hoechst Ag, 6230 Frankfurt Verfahren zur herstellung bifunktioneller tertiaerer aromatischer phosphansulfide
DE3532359A1 (de) * 1985-09-11 1987-03-19 Hoechst Ag Verfahren zur herstellung bifunktioneller tertiaerer aromatischer phosphanoxide
DE3544065A1 (de) * 1985-12-13 1987-06-19 Roehm Gmbh Verfahren zur herstellung von tertiaeren phosphinoxiden

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020315A (en) * 1960-08-26 1962-02-06 Monsanto Chemicals Aryl phenyl alpha, alpha, alpha-trifluoro-m-tolyl phosphines and oxides thereof
US3032589A (en) * 1959-08-04 1962-05-01 American Cyanamid Co Method of preparing organophosphorus oxides
US3035096A (en) * 1960-07-07 1962-05-15 Stauffer Chemical Co Vinyl diphenylphosphine oxide and method of producing same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733192A (en) * 1968-03-28 1973-05-15 Scottish Agricultural Ind Ltd Plant foods
US3989824A (en) * 1975-03-06 1976-11-02 M & T Chemicals Inc. Method for controlling acarids with phosphine oxides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032589A (en) * 1959-08-04 1962-05-01 American Cyanamid Co Method of preparing organophosphorus oxides
US3035096A (en) * 1960-07-07 1962-05-15 Stauffer Chemical Co Vinyl diphenylphosphine oxide and method of producing same
US3020315A (en) * 1960-08-26 1962-02-06 Monsanto Chemicals Aryl phenyl alpha, alpha, alpha-trifluoro-m-tolyl phosphines and oxides thereof

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
Bacon Chem. Abs., 1966, vol. 64, pp. 8239-8240. *
Goetz et al., Chem. Abs., 1963, vol. 59, pp. 11221 and 11222. *
Griffin, Chem. Abs., 1965, vol. 62, pp. 3905 and 3906. *
Hellmann et al., 1962, Chem. Abs., vol. 56, p. 11616. *
Hoffman et al. 1962, Chem. Abs., vol. 56, pp. 15536 to 15537. *
Isslieb et al., Chem. Abs., 1965, vol. 62, p. 9169. *
Kabachnik et al. Chem. Abs., 1967, vol. 58, p. 5720. *
Kumada et al., Chem. Abs., 1963, vol. 59, p. 8782. *
Seyferth et al. Chem. Abs.; 1964, vol. 61, p. 5687. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101655A (en) * 1975-03-06 1978-07-18 M & T Chemicals Inc. Insecticidal and ovicidal method

Also Published As

Publication number Publication date
FR2302686A1 (fr) 1976-10-01
DE2609254A1 (de) 1976-09-30
IT1060941B (it) 1982-09-30
NL182275B (nl) 1987-09-16
FR2302686B1 (nl) 1980-07-25
US4101655A (en) 1978-07-18
CH616828A5 (nl) 1980-04-30
NL7602293A (nl) 1976-09-08
NO148473B (no) 1983-07-11
BE839299A (nl) 1976-07-01
NO760773L (nl) 1976-09-07
NO148473C (no) 1983-10-19
CA1043699A (en) 1978-12-05
DE2609254C2 (de) 1985-12-12
AT346123B (de) 1978-10-25
SE7603037L (sv) 1976-09-07
DK142102C (nl) 1981-03-09
DK142102B (da) 1980-09-01
NL182275C (nl) 1988-02-16
ATA167776A (de) 1978-02-15
GB1545794A (en) 1979-05-16
DK95776A (nl) 1976-09-07
SE420258B (sv) 1981-09-28

Similar Documents

Publication Publication Date Title
US3989824A (en) Method for controlling acarids with phosphine oxides
US2861912A (en) Method for combating pests and preparations suitable therefor
US3725514A (en) O-aryl o-alkyl s-organo phosphorothidates
CA1084837A (en) Insecticidal and ovicidal compositions and method for using same
US4203932A (en) Phosphoryl hydrazines
US4024277A (en) Phosphoro-aminosulfenyl derivatives of benzofuran carbamates
US3014838A (en) Insecticides
US2982686A (en) Arylphosphate compounds
US3932631A (en) Certain organophosphorus compounds used to control insects
US3432599A (en) Organophosphorus insecticides
US2891887A (en) Dialkyl 1, 3-di(carbalkoxy)-1-propen-2-ylphosphate pesticides
US3060217A (en) Thiophosphoric acid esters
US3164623A (en) O-cyanophenyl esters of alkylphosphonic, alkylthiophosphonic, dialkylphosphinic, anddialkylthiophosphinic acids
US4194029A (en) Novel 4-chromanone-7-phosphates and phosphonates and the insecticidal use thereof
US4203979A (en) Insecticidal 1-sec. and tert.-alkyl-2-disubstituted-phosphoryl hydrazines
US3185723A (en) O-alkyl, s, 1-phenyl-2-alkoxycarbonylethyl alkylphosphonothioates
US2954317A (en) Methods and composition for control of parasites
SU608457A3 (ru) Акарицидный состав
US3636206A (en) Certain thiolophosphonamides as insecticides and acaricides
US3366715A (en) Crotonic acid, 3-hydroxy, (halo) alkenyl or (halo)alkynyl ester, di lower (halo) alkyl phosphates
US3281427A (en) N-phthalimidomethoxymethyl-o, o-dialkyl phosphorodithioate derivatives
IL36485A (en) Organo-phosphorus derivatives of iminothiazolines and their use as pesticides
US3277214A (en) S-(2-amidocarboxy-phenyl) esters of phosphorus acids
US3242043A (en) Omicron-[2-halo-1-(polyhalophenyl) vinyl] esters of omicron, omicron-dialkyl phosphorothioic and omicron-alkyl alkylphosphonothioic acids as insecticides
PL101293B1 (pl) Srodek roztoczobojczy

Legal Events

Date Code Title Description
AS Assignment

Owner name: ATOCHEM NORTH AMERICA, INC., PENNSYLVANIA

Free format text: MERGER;ASSIGNORS:ATOCHEM INC., A CORP. OF DE.;M&T CHEMICALS INC., A CORP. OF DE., (MERGED INTO);PENNWALT CORPORATION, A CORP. OF PA., (CHANGED TO);REEL/FRAME:005305/0866

Effective date: 19891231